Issue with Markdown plugin, since 3.6+

Hi, I'm the author of the plugin jsdoc-vuejs and I've just faced a rendering issue with JSDoc 3.6+.

To give you some context, the plugin parse JSDoc to find props/data/methods/... from Vue components, it generates HTML code and inject it into a doclet's description to provide a nice page like this:

But since the last minor realease, it does not fully work anymore. Some code is interpreted as a markdown block and is escaped into <pre><code>...</pre></code> (as you will see below).

Input code

Code from Counter component:

<template>
  <div>
    {{ counter }}
  </div>
</template>

<script>
/**
 * @vue-data {Number} [counter=0] Counter value
 */
export default {
  name: 'Counter',
  data() {
    return {
      counter: 0,
    };
  },
  mounted() {
    this.interval = setInterval(() => this.increment(), 1000);
  },
  beforeDestroy() {
    clearInterval(this.interval);
  },
  methods: {
    /**
     * Increment the internal counter.
     */
    increment() {
      this.counter += 1;
    }
  }
};
</script>

JSDoc configuration

module.exports = {
  plugins: [
    '../', // will load jsdoc-vuejs plugin
    'plugins/markdown',
  ],
  source: {
    include: [
      'src/',
      'src/better-components',
      'src/js',
      'README.md',
    ],
    includePattern: '\\.(vue|js)$',
  },
  opts: {
    encoding: 'utf8',
  },
};

JSDoc debug output

DEBUG: JSDoc 3.6.0 (Sat, 04 May 2019 22:43:05 GMT)
DEBUG: Environment info: {"env":{"conf":{"plugins":["../","plugins/markdown"],"recurseDepth":10,"source":{"includePattern":"\\.(vue|js)$","excludePattern":"","include":["src/","src/better-components","src/js","README.md"]},"sourceType":"module","tags":{"allowUnknownTags":true,"dictionaries":["jsdoc","closure"]},"templates":{"monospaceLinks":false,"cleverLinks":false},"opts":{"encoding":"utf8"}},"opts":{"_":[],"destination":"docs","configure":".jsdoc.js","debug":true,"encoding":"utf8"}}}
DEBUG: Parsing source files: ["/home/kocal/Dev/jsdoc-vuejs/example/src/Counter.vue","/home/kocal/Dev/jsdoc-vuejs/example/src/better-components/BetterCounter.vue","/home/kocal/Dev/jsdoc-vuejs/example/src/js/CounterJS.js","/home/kocal/Dev/jsdoc-vuejs/example/src/js/NotVueComponent.js","/home/kocal/Dev/jsdoc-vuejs/example/src/js/NotVueComponent2.js"]
Parsing /home/kocal/Dev/jsdoc-vuejs/example/src/Counter.vue ...
Parsing /home/kocal/Dev/jsdoc-vuejs/example/src/better-components/BetterCounter.vue ...
Parsing /home/kocal/Dev/jsdoc-vuejs/example/src/js/CounterJS.js ...
Parsing /home/kocal/Dev/jsdoc-vuejs/example/src/js/NotVueComponent.js ...
Parsing /home/kocal/Dev/jsdoc-vuejs/example/src/js/NotVueComponent2.js ...
DEBUG: Finished parsing source files.
DEBUG: Adding inherited symbols, mixins, and interface implementations...
DEBUG: Adding borrowed doclets...
DEBUG: Post-processing complete.
Generating output files...
Finished running in 0.31 seconds.
Done in 0.42s.

Expected behavior

rendered:

source code:

Note how is rendered the <tr> in <tbody>. It looks like a valid markdown block code and so it's parsed and rendered like a block of code (see below).

Current behavior

rendered:

source code:

A block of code has been parsed and rendered.

Workaround

I've just found a workaround while writing this issue (but I still plan to open it for informational purpose 😄 ). If I remove extra blank lines like this:

then it works for both JSDoc <3.6 and >=3.6.

Your environment

Software	Version
JSDoc	3.6.0 and more
Node.js	12.7.0
yarn	1.17.3
Operating system	Debian Stretch

Thanks :)

Start with the plugins/markdown configuration and reproduce the issue using the supplied Counter.vue example and JSDoc configuration. Compare rendering with JSDoc 3.6.0 and earlier versions, focusing on the extra blank lines that cause the HTML table content to become a code block. Done means the table renders as HTML without removing those blank lines, while the documented workaround remains unnecessary.